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ELM2 - musculoskeletal > lecture 25 - upper limb nerves > Flashcards

lecture 25 - upper limb nerves Flashcards

1
Q

What are the 2 nerves that branch from the brachial plexus at the root level?

A

Dorsal scapular nerve, long thoracic nerve

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2
Q

What nerve supplies the rhomboids and levator scapulae?

A

Dorsal scapular nerve

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3
Q

What nerve supplies serratus anterior?

A

Long thoracic nerve

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4
Q

What is the path of the axillary artery?

A

Posterior cord of brachial plexus, winds around surgical neck of humerus, supplies muscles and skin

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5
Q

What muscles does the axillary nerve supply?

A

Deltoid, teres minor

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6
Q

What area has cutaneous innervation by the axillary artery?

A

Upper lateral skin of the arm

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7
Q

What compartment of the arm does the radial nerve lie in?

A

Posterior compartment

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8
Q

What is the path of the radial nerve?

A

Posterior cord of brachial plexus, posterior compartment of arm, radial groove of humerus, passes lateral epicondyle, forearm, hand

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9
Q

What does the radial nerve supply in the arm?

A

Triceps brachii muscle

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10
Q

What nerve does the radial nerve give off in the forearm?

A

Posterior interosseous nerve

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11
Q

What does the posterior interosseous nerve (branch of radial nerve) of the forearm supply?

A

Supinator and posterior forearm compartment arm muscles

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12
Q

What area of the hand has cutaneous innervation by the radial artery?

A

Skin on lateral, dorsal 3 1/2 fingers (excluding nailbeds)

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13
Q

What nerve provides sensory innervation to the posterior arm and forearm?

A

Radial nerve

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14
Q

What areas have cutaneous innervation by the radial nerve?

A

skin on lateral, dorsal 3 1/2 fingers, posterior forearm, lateral/posterior arm

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15
Q

What is the path of the musculocutaenous nerve?

A

lateral cord of brachial plexus, arm, forearm, branch into lateral cutaneous nerve

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16
Q

What areas have cutaneous innervation by the musculocutaneous nerve?

A

Skin on lateral side of forearm (via lateral cutaneous nerve branch)

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17
Q

What nerve supplies the skin of the lateral forearm?

A

lateral cutaneous nerve, a branch of the musculocutaneous nerve

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18
Q

What muscles does the musculocutaenous nerve supply?

A

Anterior compartment of the arm muscles: biceps brachii, coracobrachialis, brachialis

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19
Q

What nerve supplies the muscles of the anterior compartment of the forearm?

A

Musculocutaneous nerve

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20
Q

What does the ulnar nerve supply in the arm?

A

Nothing - only supplies forearm and hand

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21
Q

What muscles does the ulnar nerve supply in the forearm?

A

Flexor carpi ulnaris, medial half of flexor digitiorum profundus

22
Q

What nerve supplies flexor carpi ulnaris?

A

Ulnar nerve

23
Q

What are the 3 key distal branches of the ulnar nerve that supply different parts of the hand?

A

Superficial branch, deep branch, dorsal branch

24
Q

What does the superficial branch of the ulnar nerve supply?

A

Skin of medial, palmar 1 1/2 fingers

25
Q

What does the deep branch of the ulnar nerve supply?

A

Hypothenar muscles, adductor pollicis, interossei, medial 2 lumbricals

26
Q

What does the dorsal branch of the ulnar artery supply?

A

Skin of medial, dorsal 1 & 1/2 fingers

27
Q

What branch of the ulnar artery supplies intrinsic muscles of the hand?

A

Deep branch

28
Q

What artery does the median nerve rung alongside within the arm ?

A

Brachial artery

29
Q

What does the median nerve supply in the arm?

A

Nothing, just runs through

30
Q

What muscles does the median nerve supply in the forearm?

A

Anterior compartment muscles, except flexor carpi ulnaris and lateral half of flexor digitorum profundus, which are supplied by the ulnar nerve

31
Q

What structure does the median nerve pass through from forearm to hand?

A

Carpal tunnel

32
Q

What skin does the median nerve supply in the hand?

A

Skin of palmar, lateral 3 1/2 fingers and palm/thumb, and dorsal side of distal phalanges (nail beds) of these fingers,

33
Q

What are the 3 key nerves that pass over the elbow joint?

A

Ulnar nerve, median nerve, radial nerve

34
Q

What is the dermatome of the medial arm?

A

T1

35
Q

What is the dermatome of the pinkie finger?

A

C8

36
Q

What is the dermatome of the middle 3 fingers?

A

C7

37
Q

What is the dermatome of the thumb?

A

C6

38
Q

What is the dermatome of the lateral arm?

A

C5

39
Q

Where will there be sensory loss if the radial nerve is damaged?

A

At the skin of lateral 3 1/2 fingers on the dorsal side

40
Q

What distint hand position occurs when there is damage to the ulnar artery?

A

‘Clawed hand’

41
Q

How are the thenar muscles affected in a median nerve injury?

A

Loss of coordination/strength of the thumb, unable to oppose thumb, wasting of thenar eminence

42
Q

What distinct hand position occurs in patients with median nerve injury?

A

‘hands of benediction’

43
Q

What artery supplies the anterior compartment of the arm?

A

Brachial artery

44
Q

What artery supplies the posterior compartment of the arm?

A

Deep brachial artery

45
Q

What artery supplies the superifical anterior compartment of the forearm?

A

Ulnar and radial arteries, anterior interosseous artery

46
Q

What artery supplies the deep anterior compartment of the forearm?

A

Ulnar and radial arteries

47
Q

What artery supplies the hand?

A

Radial and ulnar arteries via the superficial and deep palmar arches

48
Q

What nerve innervates the anterior compartment of the arm?

A

Musculocutaneous nerve

49
Q

What nerve innervates the posterior compartment of the arm?

A

Radial nerve

50
Q

What nerves innervate the anterior compartment of the arm?

A

Median nerve, ulnar nerve

51
Q

What artery supplies the posterior compartment of the forearm?

A

Posterior interosseous artery

52
Q

What nerve innervates the hand?

A

Median nerve, ulnar nerve

ELM2 - musculoskeletal (28 decks)

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